package threading;

/**
 * Created with IntelliJ IEDA.
 * Description:
 * User:86186
 * Date:2022-08-20
 * Time:21:53
 */

/*在子线程执行完毕后再执行主线程代码
作业内容
有20个线程，需要同时启动。
每个线程按0-19的序号打印，如第一个线程需要打印0
请设计代码，在main主线程中，等待所有子线程执行完后，再打印 ok*/

public class HomeWork {
    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(()->{
            System.out.println("0");
        });
        Thread t2 = new Thread(()->{
            System.out.println("1");
        });
        Thread t3 = new Thread(()->{
            System.out.println("2");
        });
        Thread t4 = new Thread(()->{
            System.out.println("3");
        });
        Thread t5 = new Thread(()->{
            System.out.println("4");
        });
        Thread t6 = new Thread(()->{
            System.out.println("5");
        });
        Thread t7 = new Thread(()->{
            System.out.println("6");
        });
        Thread t8 = new Thread(()->{
            System.out.println("7");
        });
        Thread t9 = new Thread(()->{
            System.out.println("8");
        });
        Thread t10 = new Thread(()->{
            System.out.println("9");
        });
        Thread t11 = new Thread(()->{
            System.out.println("10");
        });
        Thread t12 = new Thread(()->{
            System.out.println("11");
        });
        Thread t13= new Thread(()->{
            System.out.println("12");
        });
        Thread t14= new Thread(()->{
            System.out.println("13");
        });
        Thread t15= new Thread(()->{
            System.out.println("14");
        });
        Thread t16= new Thread(()->{
            System.out.println("15");
        });
        Thread t17= new Thread(()->{
            System.out.println("16");
        });
        Thread t18= new Thread(()->{
            System.out.println("17");
        });
        Thread t19= new Thread(()->{
            System.out.println("18");
        });
        Thread t20 = new Thread(()->{
            System.out.println("19");
        });
        t1.start();
        t2.start();
        t3.start();
        t4.start();;
        t5.start();
        t6.start();
        t7.start();
        t8.start();
        t9.start();
        t10.start();
        t11.start();
        t12.start();
        t13.start();
        t14.start();
        t15.start();
        t16.start();
        t17.start();
        t18.start();
        t19.start();
        t20.start();
        t1.join();
        t2.join();
        t3.join();
        t4.join();;
        t5.join();
        t6.join();
        t7.join();
        t8.join();
        t9.join();
        t10.join();
        t11.join();
        t12.join();
        t13.join();
        t14.join();
        t15.join();
        t16.join();
        t17.join();
        t18.join();
        t19.join();
        t20.join();
        System.out.println("OK");
    }
}
